Namesakes
Cosimo de' Medici
(m) 1389-1464 
Notable Businesspeople
Cosimo I de' Medici
(m) 1519-1574
Other Royalty 1537-1574 Tuscany (grand duke)
Cosimo Piovasco di Rondò
(m)
Fictional Characters from Books 1957 The Baron in the Trees